Three different packaging systems: vacuum packaging, rosemary active packaging, and oxygen scavenger
packaging were compared for their ability to counteract lipid oxidation in pork patties upon storage at
5 C for 60 days following high pressure processing (HPP) (700 MPa, 10 min, 5 C). Lipid oxidation was
studied at the surface and the inner part by measuring secondary lipid oxidation products (TBARs) and
the tendency to form radicals by electron spin resonance (ESR) spectroscopy. Lipid oxidation was lower in
the inner part than at the surface for all three packaging systems. Rosemary active packaging was the
most effective method to protect pork patties from the HPP-induced lipid oxidation, while oxygen
scavenger packaging was not effective since residual oxygen remained in the package in the initial period
of storage. The kinetics of the oxygen trapping by oxygen scavengers appears to be a crucial factor for this
application.